Directions; Pour your milk into the dish until there is a layer of milk. Make different drops of food coloring around your milk dish. Once you are sure you have enough food coloring, dip your toothpick in your soap, and tap it on the surface of the milk. The food coloring will avoid the soap. The first drop of soap will have a dramatic effect, to continue the movement, we added more soap than the first time. You can see this in the video below.